Doob-lock



UNITED STATES PATENT oFFioE.'

WILLIAM STEPHENSONOF CINCINNATI, OHIO.

Doon-LOCK.

Specification of Letters Patent No. 5,766, dated September 12, 1848.

To all whom t may concern l Be it known that I, WILLIAM STEPHENsoiv, of t-he city of Cincinnati, county of Hamilton, and State of Chio, have invented a newy and the inside tumblerv'up, and the lslide4 to which the dog is attached raised and the" lower end of the dog in contact with the periphery of the revolving plate, the C ap plate of the lock which comesnext the door being removed in order to show these several parts of the lock, and the key hole inthe back plate of the lock to insert the key lon that side. Fig. 2, represents in black lines the position of the slide and tumbler when the bolt is thrown out from the inside of the lock, the dotted lines showing the position of the slide and tumbler when the bolt is thrown in from the inside, the dotted lines showing the position of the slide and also y of the dog on the notched plate when the key is turned to its position of insertion and the bolt thrown in. Fig. 3, is a verti.. cal transverse section of the lock through the center of the circular revolving plate on the dotted `line m o? of Fig. 1, showing the box, bo-lt, tumbler, revolving plate and case attached to it, springs, slide dogs and arms. Fig. 4, is a plan showing the underside o-f the revolving notched plate and the key case attached or combined with it. Fig. 5 is a side elevation of the notched plate and case. tumblers. Fig. 7, is a side elevation of the bits of the'key. Fig. 8 is an end elevation of the key. Fig. 9, is an Ielevationof the mortised slide that moves over the shanks of screws or inserted into the box vand to which the vibrating dog is attached for holding the notched plate from turning back. Fig. 10, is a view of the bolt detached from the lock; Fig. 11, the slides; Fig. 12, the inner tumbler. Fig. 13, is a view of the outside of the cap plate. Fig. 14 is a view of the inside of the cap plate. Fig. 15 is a side elevation of the bolt.

Fig. 6, is a plan of one of the' Similar letters inV the several figures refer to correspondingparts.

Inthis lock thevbox B', bolt a, tumblers `Z) and springs T are made and arranged in `the usual manner; therefore I shall not give a particular description of theseparts.

.\ .My improvements relate principally to: 5`

ythe manner o-f constructing, arranging, and operating a revolving circular vnotched plate having an incasement o-n its under side to admit ythe key which'turns with fthe key and plate; a slide and vibrating dog; a slide and if tumbler; certain pins or projections in the ;bolt and revolving plate; and afslide to which the dog is attached; and certain notchesl and corresponding, projections for y".

enteringthe same.'

Iny this lock there is a revolving plate g having'a number of notches z, in its peripheryto admit thepoints of the reversing-dog p (to be presently described) for the purpose of `preventing the key from being turned back toward the key hole, just lbefore commencing to raisethe tumblers, one of said notches h2 being designed to re-v ceive the arm A ofthe vinner tumbler e' in A u order to prevent the key from being turned l5 on the outside at the key holeD when locked on the inside at the key hole C and also for preventing the withdrawal `of the key before it shall have'performeda' completek als revolution on its axis; said plate "having a case Z for the keyk secured to its outside and f turning with it on whichv wards lm are formed that enter corresponding grooves'n in the key and on which lare formed wings o n j to prevent the lock being picked, the plate# 'l also having two projections z', y, on the same side the case is on, one of said kpins L being designed to strike' against the projection B onfthe slide g'tochange the position of the ydog p, also to stop the key at its proper place to be taken out ofY the lock by comingI in Vcontact with the projection B and also for preventing the key from being turned when an attempt is made to open the lock by any false instrument whenL the bolt is lockedby striking against the projection o2` on' the bolt a; the other pinj which is nearer the center y of the plate'is for the purpose of preventing the plate and key being turned around should an attempt be made to get anv impres.

sion ofthe tumblers and' notch j. in the bolt when the bolt is in, by striking said projec-` tion 02. The bearings of this revolving lplate are in the inner and` outer platesof the lock. Y The bearing neXt the cap is formed by an extension of the tubular or cylindrical port-ion of the case through the` near the edge of the-revolving plate.

` The slide g for'changing the position of the dog is attached to a block E aty the endV of the lock near the edge of the revolving plate by pins E on which it moves back and forth bythe action of the projection z' onthe circular'plate striking the projection B on the slide, being perforated with oblong mortises to allow it to move on said pinsE.

The spring 7* for reversing the position of the dog is attached at one end to the end of the lock, the otherend bearing upon the back of the dog to 'change its position when moved by the slide. y

The slide Z for holding the inner tumbler e up, when the bolt is moved from the inside of the lock, is pierced with Atwo oblong openings cl which permit it to slide back and forth on two studs 22 inserted into the inner plate of the lock and is notched on its lower edgeat d2 to admit the bit of the key to move it to the right and left. It has also a projection or tooth s on its upper edge which keeps the tumbler e out of the way of the bolt when the latter is moved from the outside.

The inner tumbler e is attached to the inner plate of the lock by a pin e passed through its sinaller end on which it turns and has three notches on its lower edge lettered e2, Quand two projections or arms A, on its side. The notch e2 nearest the vpin on which it turns ismerely to admit it to pass by the stud s on which the bolt a slides. The notch u neXt to it is to keep the slide in its place by ,admitting the projection s of the slide to enter it and also to keep the slide up so that the bolt can be moved from the outside. The third notch is deeper than. the others, to permit the short arm of the tumbler to fall into the notch y of the bolt when locked on the inside to prevent the bolt from being moved from the outside of the lock.

The pin C2 on the bolt a near the mortise notch lw is designed for the purpose of preventing the openingof the lock from the outside by means of any false instrument by the projection c' on the revolving plate g striking against it, and also for the prevention of taking an impression of the tumblers and bolt when the bolt is in, by means of the projection y' on the revolvingV plate' g striking against the said pin C2 as before Amentioned and thus arresting the motion of the plate g, it being prevented from turning back by the dogp falling into notch h. The

division plate o inside of the lock reaching fromt'he bottom of the lock to the tumblers` Yand bolt7 between the outside and inside key holes is to prevent the introduction of any .instrument to pick the lock when locked on the inside.

: l Thekey islsimilar to other keys lwith the exception that lthere is a groove a on each side of the bit to receive the wards or proj ections m in the bore of the case.

Operation: Tothrow the bolt out to lock the door adjust the lock by placing the cir- `cular plate gin such v'position as to bring `the pin above the projection B on the slide of the dog y?. the slide being forced down as far as it will go, the upperarm of the dog being against the -circular plate g (as represented by dotted lines in Fig. 2). Now in- `sert the key and turn it in the direction to push the bolt out. Justbefore thebit of the keytouches the tumblers and thebolt a the dog p (acting against the periphery of the revolving plate) falls into one of the notches t and prevents the key fromturning back, the key being turned in the same direction still farther the dog continues to fall into the notches Il. luntil the bolt is thrown out, and the motion ofthe key being continued until it arrives nearlyT opposite the key hole the pin i strikes the' projection B of the slide q and moves the slide up to reverse the lposition of the dog which is effected by moving it against the point of the spring r, which is made to bear against the dog alternately on either side of its center 77 as the slide ismoved up and down by the motion ofthe circular plate.

To move the bolt in7 the key is turned in the opposite directionJ the operation of the lock being the same as when locking. In locking and unlocking this lock the key must always be brought opposite the place of insertion in order to be turned in a con-` trary direction. i

If it be attempted to get an impression of the tumblers by means of a skeleton key or, any other instrument; or if an attempt be made to open the lock by a false key-if the false key or other instrument do not move the bolt at the rst trial the pin z' will strike In locking the bolt on the inside the key not only operates on the tumblers b and bolt a as in ordinary locks but the inner part a of the key-bit raises the tumbler e and moves the slide d so that the bolt a is moved out (the slide l being moved with the bolt) the tumbler e is let down and a projection on the tumbler falls into the notch y in the bolt and secures the bolt from being moved by the same key, or any other means, from the outside and remains in that position until the bolt is moved in by means of the key to unlock the lock from the inside, which is done by turning the key in opposite direction.

When the bolt is thrown out fromthe inside the bent arm A ofthe tumbler e falls into a notch h2 in the revolving plate gso that the key cannot turn the said plate g from the outside, nor can the lock be un-v locked or picked from the outside,-by any key or instrument, when thus held by the arm A. l

Having thus fully described the manner in'which I combine and arrange the respective parts of my lock andthe manner in which they operate when the bolt is moving in or out, what I claim as new and of my invention, and desire to secure by Letters Patent, isy l. The application of the circular revolving notched plate g and the pins i and thereon-the slide g and dog p constructed and operating substantially as herein .de-k

scribed and set forth.

2. I likewise claim the employment of the additional pin C2 inserted into the bolt a in combination with the pins i and j in the revolving plate g arranged and operating substantially in themanner and for the purposesvherein fully set forth.

v3. Ik. also claim the application of the slide Z in combination withk the additional 'tumbler e constructed and operating subpicked when Vlocked on` ,the inside as described and set forth. y.

I hereby disclaim all invention to the other parts of the lock as heretofore known and used.

WM. P. ELLIOT, WASHINGTON FENWICK. 

